红色长余辉材料Y_2O_2S:Eu^(3+),Si^(4+),Zn^(2+)的微波合成及性能研究

Microwave synthesis and properties characterization of Y_2O_2S:Eu^(3+),Si^(4+),Zn^(2+) red lasting phosphor

采用微波法合成了红色长余辉发光材料Y2O2S:Eu3+,Si 4+,Zn2+,研究了微波辐射功率和加热时间对制备Y2O2S:Eu3+,Si 4+,Zn2+的影响。并且对样品进行了XRD、SEM、荧光光谱和热释光谱等表征。XRD测试表明所制备的Y2O2S:Eu3+,Si 4+,Zn2+为单相,六方晶系;荧光光谱测试表明,用λem=626nm作为监控波长,在200～400nm之间有宽的激发光谱,峰值位于325nm。而发射光谱的谱线较窄,来源于Eu3+的5 D0→7F2跃迁的发射峰627.0nm最强。其中以辐射功率为750w,反应时间为25min所制备的样品发光性能最好。

The Y2O2S：Eu^3＋,Si^4＋,Zn^2＋ red phosphors were synthesized by microwave heating method, and the effect of the microwave power and irradiation time on the luminescence property of the material Y2O2S：Eu^3＋,Si^4＋,Zn^2＋ were studied. The samples were characterized by x-ray diffraction patterns,SEM,photoluminescence （PL）spectra and thermo luminescence. The XRD and SEM results showed that Y2O2S：Eu^3＋,Si^4＋,Zn^2＋ phosphors possessed hexagonal crystal structure. The testing of PL spectra showed that under 626nm excitation, there was one wider band excitation peak in the excitation spectrum, peaking at 325nm. The strongest absorption peak was 627. 0nm,which correspond to the transition ^5D0 →^7F2 of Eu^3＋ ions. Among these samples, the phosphor Y2O2S：Eu^3＋,Si^4＋,Zn^2＋ prepared under microwave power 750 W and irradiation time 25min showed excellent luminescence characteristics.